Slip-socket.



No. 785,105. f PATENTED MAR. 21, 1905.y D. K. JOHNSTON.

SLIP SOCKET.

APPLICATION FILED DBO. '1, 1904.

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Witt/Luau UNITED STATES Patented March 21, 1905.

PATENT OEEIcE.

DAVID K. JOHNSTON, OF OIL CITY, PENNSYLVANIA', .ASSIGNOR TO OIL WELL SUPPLY COMPANY, OF PITTSBURG, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA.

ASLIP-SOCKET.

SPECIFICATION forming part of Letters Patent No. 785,105, dated March 21, 1905.

Application filed December 7,1904. Serial No. 235,883.

fo fil?, whom, it may concer-n.-

Be it known that I, DAVID K. JOHNSTON, a citizen ofthe United States, residing at Oil City, in the county of Ven ango, State of Pennsylvania, have invented certain new and usefulImprovements in Slip-Sockets; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, wherein- Figure I is a longitudinal central section of a slip-socket embodying my invention and in connection therewith the extension-sleeve and extension-section whereby the socket may be lengthened when desired. Fig. 2 is a longitudinal central section of the slip-socket shown in Fig. 1, the extension-sleeve and extensionsection omitted. Fig. 3 is a top plan view of the upper or pin member of the slip-socket. Fig. 4 is a side elevation of the upper or pin member of the slip-socket. Fig. 5 is a top view of the box member of the slip-socket. Fig. 6 isa side elevation of the box member of the slip-socket. Fig. 7 is a sectional view of the extension-sleeve of the slip-socket. Fig. 8 is a side elevation of the extension-section of the slip-socket. Fig. 9 is a transverse section of the box member, taken on the line 9 9, l, showing the slips in position. Fig. IO is a detached view of one of the slips or wickers. Fig. 11 is a side elevation of the check member, and Fig. 12 is a bottom plan view of the check member.

Like symbols refer to like parts wherever they occur.

My invention relates to that class of shingtools commonly termed slip-sockets employed for removing broken sucker-'rods and similar obstructions from oil or Artesian wells.

Slip-sockets in general may be said to comprise in combination a pin member, a box member or socket member, included slips or wicker members, and a spring which bears upon the slips or wicker members and' which yieldingly supports the slips or wicker members and permits them to adjust themselves to the object to be seized and withdrawn from* the well. As commonly constructed the slips or wickers have no interdependency of movement. Consequently the slips or wickers frequently recede or advance individually and unequally, which often results in the obtaining of a limited and insecurey hold on the article to be withdrawn from the well or the displacement and escape of a slip or wicker fromV the socket or such an unequal application of'the strain to the slips or wickers as results in a slip being pulled through the bottom of the socket, giving rise to serious fishing jobs for the removal of the slip from the well, with the attendant loss of time and the loss of the use of the tool until such time as the lost slip is replaced. Furthermore, where, as is frequently the case with sucker-rods, a long slanting breakof the rod has occurred slip-sockets of the usual constructions will not so accommodate the broken section of the rod as to permit of the slips or wickers properly seizing the rod with an efHcient hold. To overcome these several objections to slip-sockets as at present constructed is the object of the present invention.

` To this end I combine with a suitable socket a series of interdependent slips or wickers and means for maintaining a parallel relation of the slips or wickers throughout their movement, and such a construction embodies one feature of my invention.

I preferably employ for the purpose of inducing the interdependency of movement of the slips'means slidable in the slip-socket and which interlock with the slips or wickers, so as to permit a radial' sliding movement of the slips to and from the axial line of the socket and at the same time prevent any escape thereof from the socket, and such a construction embodies a further feature of my invention.

There are other minor features of invention dependent upon the particular elemental construction and special combinations of the coacting elements, all as will hereinafter more fully appear.

I will now proceed to describe my invention more fully, so that others skilled'in the art to which it appertains may apply the same.

In the drawings, 1 indicates the upper or pin member of the socket, which may be of tubular form, threaded, as at 1, for connection with the rod or pipe or equivalent means whereby the slip-socket is lowered into thc well, and also threaded, as at 1b, for connection with the box member 2 of the socket or with an intermediate extension-section 7, as circumstances may require. Intermediate ot' the threaded portions 1u 1b'the pin member is of polygonal form, as at 1C, to form a wrenchseat, whereby a wrench may be used in Vseparating the socket from its connections or the members of the socket from each other.

2 indicates the lower or box member of the slip-socket, said member being of tubular form, coned out, as at 2, for the reception of the slips or wickers 3 3 3 and provided with a bell-mouth 2 to Jfacilitate the entrance into the socket and between the slips or wickers of the obstruction which is to be seized and withdrawn from the well. The upper end of this box member 2 is internally threaded, as at 2", for the reception oi' the threaded lower endvof the pin member 1 or the lower end of extension-section 7, as the case may be.

3 3 3 indicate a series ot' separate slips or wickers of general wedge shape, constituting i when taken as a whole an internally-threaded hollow truncated cone somewhat less in dimensions than the interior cone chamber 2IL of the socket 2, so as to permit the separate sections 3 3 3 to move radially to and from the axial center of the socket to seize or release an included object. Upon the upper end oi' each slip 3 is a projection 3 ot' T or other suitable shape adapted to interlock with and slide in a radially-disposed slot or way 4 in the lower end of a sleeve or check member 4, which occupies the interior of the box member 2 of the socket just over the slips or wickers.

4 indicates the check member slidable in the slip-socket and preferably in the form of an annulus or sleeve, provided on its lower end with a series of radially-disposed T slots or ways 4 for the reception ot' the T-heads 3 on the upper ends of the slips or wickers 3 3 3.

rlhe several elements hereinbefore set forth when taken in conjunction with a spring 5 and a disk 6, interposed between the spring and the sleeve 4 or check member and duly assembled as indicated in Fig. 2 of the drawings, will constitute an efficient slip-socket for ordinary service. In cases where the length of the bore of such a socket is not suficient to accommodate the broken end ot' a sucker-rod or other obstruction which is to be withdrawn from the well I provide an extension-section 7, threaded externally, as at 7, for connection with the box member 2, and internally, as at 7D, for reception of the pin memberl of the socket, and in connection therewith I provide a loose extensionsleeve 8 of surlicient length, which may be inserted within the extension-section 7 and which will be intercheck member 4, the whole when assembled constitutingtheextensible slip-socket. (Illustrated in Fig. l of the drawings.)

The several elements being constructed and combined substantially as hereinbefore pointed out, will operate as follows: The slipsocket being lowered into the well in the usual manner until it encounters the obstruction to be removed, said obstruction will enter the bell-mouth 2b of the socket axially and encounter the slips or wickers 3 3 3, which slips or wickers being yieldingly supported by the spring 5 will recede or rise in the socket and at the same time open or move out radially to permit the entrance of the obstruction. As the several slips or wickers are each connected to or interlocked with the sleeve or cheek member 4, there is an interdependency ot` movement which causes the slips or wickers to rise uniformly in the socket, and as the radial movement of the slips or wickers 3 3 3 is controlled by the sliding of the interlocking parts of the slips and check member and confined or restricted laterally by the inclined inner walls of the cone-shaped slip-chamber 2a the slips or wickers will recede uniformly from the axial line of the slip-socket. The obstruction to be withdrawn from the well having entered sufiiciently Jt'ar within the socket and having lifted and engaged the slips or wickers 3 3, the socket is raised in the well, which upward movement of the socket, by reason of the coned interior of said socket, causes the slips or wickers to move uniformly toward the axial center ot' the socket, and thus effectively seize and hold-the obstruction, which will be withdrawn from the well with the socket. It' the entering portion ot' the obstruction exceeds in length the bore of the slip-socket below the disk 6, it will strike and lift the disk without injury to either the spring 5 or the slips or wickers, and in such a case the pin member 1 of the socket is unscrewed from the box member 2 and the extensionsection Tand extension-sleeve 8 interposed between the members 1 and 2, the spring 5 and disk G being located between the pin member 1 and the extension-sleeve 8, so as to effectively lengthen the bore of the socket between the slips and spring and protect the spring, as hereinbefore noted.

Among the advantages incident to the construction hereinbefore set forth are that the slips or wickers being rendered interdependent and their movements simultaneous and similar' their position with relation to and their grip upon the article to be withdrawn from the well will be uniform and equal, and there will be no liability of one of the slips being subjected to the entire strain and being drawn down and stripped from the socket, as Jr'requently'occurs in slip-sockets of the present construction. Furthermore, the slips are,

in eii'ect, anchored to the check member and in the socket at all times, so that there is no liability ofthe loss of a slipunder any condition of service.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination in aslip-socket of a check member slidable in the slip-socket, and a plurality of slips or wickers connected with and slidable on the check member, substantially as and for the purposes specified.

2. The combination in a slip-socket of an annular check member slidable in the slipsocket, and a plurality of slips or wickers connected with and slidable on the check member, substantially as and for the purposes specified.

3. The combination in a slip-socket, of a plurality of slips or Wickers, and a check member slidable in the slip-socket, said member and slips provided with interlocking slidable connections, substantially as and for the purposes specified.

a. Ihe combination in a slip-socket, of a check member slidable in the slip-socket said check member having radial slots or ways, and a plurality of slips or wickers having parts adapted to traverse the slots or ways of the check member, substantially as and for the purposes specified.

5. The combination in a slip-socket, oi' a check member slidable in the slip-socket andprovided with radially-disposed T-slots, and a plurality of slips or wickers provided with T-heads, substantially as and for the purposes specified.

6. The combination in a slip-socket, of a check member, a plurality of slips or Wickers connected to and movable radially on said check member, and means for yieldingly supporting said check member, substantially as and for the purposes specified.

7. The combination in a slip-socket, of a check member, a plurality of slips or wickers connected to said member and movable therewith and thereon, and a spring for yieldingly supporting said check member, substantially as and for the purposes specified.

8. The combination in a slip-socket, of a check member, a plurality of slips or wickers connected to said member and movable therewith and thereon, a spring for yieldingly supporting said member, and a disk interposed between the spring and check member, substantially as and for the purposes specified.

9. The combination in a slip-socket, of a pin member, a boX member, an interposed eX- tension-section, a plurality of slips or wickers, a spring, and an extension-sleeve interposed between the slips or wickers and the spring, substantially as and Jfor the purposes speciiied.

10. The combination in a slip-socket, of a pin member, a boX member, an interposed eX- v tension-section, a plurality of slips or Wickers, a check member, a spring, and an extensionsleeve interposed between the spring and the check member, substantially as and for the purposes-specified.

11. The combination in a slip-socket, of a lplurality of yieldingly-supported wickers,

and means for permitting a movement of the Wickers to and from the axis of the socket and for maintaining the parallel relation of the wickers throughout their movement, substantially as and for the purposes speciiied.

12. In a slip-socket, the combination with a yieldingly-supported check member slidable in the socket, of a plurality of Wickers slidably connected with the check member, substantially as and for the purposes specified.

In testimonywhereof I aiiiX my signature, in presence of two Witnesses, this 5th day of December, 1904.

DAVID K. JOHNSTON. 

